package com.yxy.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户的session
        Object loginuser = request.getSession().getAttribute("LoginUser");
        //如果用户没有登陆
        if(loginuser == null){
            request.setAttribute("msg","请登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }else {
            return true;
        }
    }
}
